itkIdentityTransferFunction.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkIdentityTransferFunction.h,v $
  Language:  C++
  Date:      $Date: 2005/08/02 19:17:37 $
  Version:   $Revision: 1.1 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/

#ifndef __itkIdentityTransferFunction_h
#define __itkIdentityTransferFunction_h

#include "itkTransferFunctionBase.h"

namespace itk
{
namespace Statistics
{

template<class ScalarType>
class IdentityTransferFunction : public TransferFunctionBase<ScalarType>
{
public:

  typedef IdentityTransferFunction Self;
  typedef TransferFunctionBase<ScalarType> Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  itkTypeMacro(IdentityTransferFunction, TransferFunctionBase);

  itkNewMacro(Self) ;


  ScalarType Evaluate(const ScalarType& input) const;

  ScalarType EvaluateDerivative(const ScalarType& input) const;

protected:

  IdentityTransferFunction();
  ~IdentityTransferFunction();

  virtual void PrintSelf( std::ostream& os, Indent indent ) const;

};//class

} // end namespace Statistics
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
  #include "itkIdentityTransferFunction.txx"
#endif


#endif

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